Nut-locking device



G. S. EVANS. NUT LOCKING DEVICE. APPLICATION FILED FEB. 9, 1920.

, Patented May 18, 1920.

4? M M a a6 7 3M x M M J GEORGE s. EVANS, or ooaarone, NEAR rowone, VICTORIA, AUSTRALIA.

NUT-LOCKING- DEVICE.

Application filed February 9, 1920.

To all whom it may concern.-

Be it known that I, GEORGE SEX'roN EVANS, a subject of the King of Great Brltain and Ireland, and a resident of Bringenbrong, a pastoral property or station near the post-town of Corryong, in the parish of Towong, county of Benambra, State of Victoria, Commonwealth of Australla, whose post-oflice address is Bringenbrong, Upper Murray, via the said posttown of Corryong, have invented a certain new and useful Improved Nut-Locking Device, of which the following is a specification.

This invention-relates to devices for looking screw threaded nuts against rotation on the bolts, studs or like members with whlch they are engaged, whereby the nut when screwed home is prevented from working loose on or becoming disengaged from the bolt or the like owing to vibration or other causes.

The object of the invention 18 to provide a simple and effective device of the above class which may be easily applied to ordlnary nuts and in no way injures the nut or bolt, the latter being thus capable of repeated use for different purposes. The 1nvention, moreover, enables the nut to be readily slackened or removed, if desired, without injury to the thread or other parts.

Referring to the drawings which form part of this specification:-

Figure 1 is a transverse section through a nut according to my invention.

Fig. 2 is a plan of Fig. 1.

Fig. 3 is a view of a locking screw having a squared head.

Fig. 4 is a view looking at the right hand end of Fig. 3.

Fig. 5 shows a modified locking screw.

Fig. 6 is a view looking at the right hand end of Fig. 5.

Fig. 7 is a perspective view of the looking screw retaining yoke.

Fig. 8 is a side view ofa retaining yoke having elongated openings or slots to accommodate the heads of the locking screws.

Fig. 9 is a side view of a retainlng yoke adapted for use with the type of locking screw seen in Figs. 5 and 6.

Fig. 10 is a plan showing the parts of the invention assembled. I

Fig. 11 is a section on line A-A of Fig. 10.

Specification of Letters Patent.

Patented May 18, 1920.

Serial No. 357,443.

Fig. 12' is a side view of Fig-10.

Fig. 13 is a side view showing the locking screw seen in Figs. 5 and 6 and the yoke seen in Fig. 9 fitted to a nut.

Fig. 14 shows the retaining yoke seen in Fig. 8 in use with square headed locking screws.

Fig. 15 is an enlarged transverse section of a nut having internal pockets to receive pads of soft metal or the like which bear against the thread of the bolt or stud.

Fig. 16 shows one of the pads above mentioned in use.

According to the invention any ordinary or suitable nut 2 is provided preferably with two diametrically opposite screw threaded holes 8. These holes extend transversely or radially through the wall of the nut from the side face or flat 4 to the inner threaded circumference 6. As seen in Fig. 1 the holes 3 are preferably disposed out of alinement in a vertical or axial direction for a distance equal to the pitch of the thread 6 the inner ends of the holes passing through the crown of said thread so that the points of the locking screws hereinafter described, will enter the groove of the thread on the bolt or other member 7 to which the nut is to be locked.

In each of the threaded holes 3 is fitted a locking screw 8, the inner end of which is preferably pointed as at 9 to engage within the groove of the thread'in the bolt or like member 7 The outer end or head of each looking screw projects beyond the side of the nut 41: and is preferably squared as at 11 to receive a spanner or like turning tool. This squared head also serves to prevent rotation of the locking screw as will be hereinafter better understood. As an alternative the heads of the locking screws may be flattened on one side as at 12 and provided with a turning slot 13 to receive a screw driver or the like, the flattening likewise serving to hold the screws against rotation.

In combination with the foregoing a locking screw retainer is employed. This consists of a substantially U-shaped or semi-circular retaining yoke 14 preferably of plate spring metal. Formed through said yoke near its two ends are two diametrically opposite holes 16. These holes may be of square formation as at 17 to accommodate the squared heads 11 of the locking screws, or they may be partially round and flattened as at 18 to accommodate the heads of screws of the modified type seen in Figs. and 6.

As seen in Fig. 8 the holes in the ends of the retaining yoke 1.4: may be of elongated rectangular formation as at 19 to facilitate removal of the yoke from the squared heads 11 of the locking screws.

The retaining yoke partly embraces the nut 2 and the holes 16 in its ends are sprung over the heads of the locking screws after the latter have been screwed home as seen in Figs. to 14. The locking screws, owing to their squared or flattened heads and the corresponding shape of the holes 16, are thus held against rotation and etfectively prevented from working loose within the nut while the inner ends or points 9 of the locking screws being pressed tightly into the groove oi the thread on the bolt or like member 7, prevent rotation of the nut 52 upon the bolt.- Should it be desired to remove the nut, the legs of the re taining yoke let are sprung apart and re moved from the heads of the locking screws. The latter may now be slackcned back and the nut screwed oil.

If desired the nut 2 may be provided with pockets 21 formed in its inner threaded circumference 6 as seen in Figs. and 16. These pockets accommodate pads 22 of soft metal or other suitable material which are pressed tightly against the thread of the belt or the like 7 by means of the locking screws 8 as clearly seen in Fig. 16. The use of these pads besides increasing the frictional grip on the bolt also obviates any possibility of damage to the thread of the latter.

Having now described my invention what I claim as new and desire to secure by Letters Patent is 1. The combination of a nut having a threaded, central opening for the passage of a bolt therethrough and also having a pair engaged in said threaded grooves to hold the nut against rotation on the bolt, saidscrews prqectmg at their outer ends through the holes; and a spring yoke partially encircling the side wall of said nut and provided iKlJilcent its opposite ends with openings wherein the projecting ends of the screws are ongaged, said yoke openings and screw ends having coacting plane portions to hold the screws against rotation.

2. The combination of a nut having a threaded, central opening for the passage of a bolt therethrough and also having a pair of diametrically opposite, threaded holes which are disposed radially of the nut and extend at their inner ends through the wall of the 'bolt opening and at their outer ends through the correspondingside faces of the nut, said holes being ofi'set vertically from each other a distance equal to the pitch of the threads of said opening whereby the inner ends of theholes are disposed directly opposite the grooves between the threads on the bolt; and a pair of fastening screws inserted through said holes and having pointed ends immediately engaged in said thread grooves to hold the nut against rotation on the bolt.

In testimony whereof I allix my signature.

GEO. S. EVANS.

Witness:

FRED. W. .TIIETYENS. 

